Home / 20,135.75-30,207.95-7,823.75

Finding the Fourth Proportional to 20,135.75, 30,207.95 and 7,823.75

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Solution

The fourth proportional to 20,135.75, 30,207.95 and 7,823.75 is: 11,737.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.75 : 30,207.95 = 7,823.75 : x
  2. Step 2: Convert to fraction form
    20,135.75/30,207.95 = 7,823.75/x
  3. Step 3: Cross multiply
    20,135.75x = 30,207.95 × 7,823.75
  4. Step 4: Simplify right side
    20,135.75x = 236,339,448.81
  5. Step 5: Solve for x
    x = 236,339,448.81/20,135.75
  6. Step 6: Final answer
    x = 11,737.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.